Python语言程序设计基础(第2版) 课后题 第三章

#3.1
import math
dayup=math.pow((1.0+0.001),365)
daydown=math.pow((1.0-0.001),365)
print("向上:{:.2f},向下:{:.2f}.".format(dayup,daydown))
向上:1.44,向下:0.69.
#3.2
import math
dayup=math.pow((1.0+0.005),365)
daydown=math.pow((1.0-0.005),365)
print("向上:{:.2f},向下:{:.2f}.".format(dayup,daydown))
向上:6.17,向下:0.16.
#3.3
import math
dayfactor=0.01
dayup=math.pow((1.0+dayfactor),365)
daydown=math.pow((1.0-dayfactor),365)
print("向上:{:.2f},向下:{:.2f}.".format(dayup,daydown))
向上:37.78,向下:0.03.
#3.4
dayup,dayfactor=1.0,0.01
for i in range(365):
    if i % 7 in [6,0]:
        dayup=dayup*(1-dayfactor)
    else:
        dayup=dayup*(1+dayfactor)
print("向上5天向下2天的力量:{:.2f}".format(dayup))
向上5天向下2天的力量:4.63
#3.5
def dayUp(df):
    dayup=1.0
    for i in range(365):
        if i%7 in [6,0]:
            dayup=dayup*(1-0.01)
        else:
            dayup=dayup*(1+df)
    return dayup
dayfactor=0.01
while(dayUp(dayfactor)<37.78):
    dayfactor+=0.001
print("每天努力的参数是:{:.3f}.".format(dayfactor))
每天努力的参数是:0.019.
#3.1
def wightChange(w):
    for i in range(10):
        w_h=w*0.165
        print("第{:^3}年,你的月球体重是{:.2f}".format((i+1),w_h))
        w+=0.5
wight=input("请输入你的地球体重:")
wightChange(eval(wight))
请输入你的地球体重:22
第 1 年,你的月球体重是3.63
第 2 年,你的月球体重是3.71
第 3 年,你的月球体重是3.80
第 4 年,你的月球体重是3.88
第 5 年,你的月球体重是3.96
第 6 年,你的月球体重是4.04
第 7 年,你的月球体重是4.12
第 8 年,你的月球体重是4.21
第 9 年,你的月球体重是4.29
第10 年,你的月球体重是4.37
#3.2
day = 0
week = 0
dayup = 1
for i in range(365):
    day = day + 1
    week = week + 1
    if week <= 3:
        dayup=dayup
    elif week < 7 and week >= 4:
        dayup = dayup*(1+0.01)
    elif week == 7:
        dayup=dayup*(1+0.01)
        week = 0
print("连续学习365天后能力值是:{}".format(dayup))
连续学习365天后能力值是:7.922198989348805
#3.3.1
dayup = 1
dayfactor = 0.01
period = [4,5,6,0]
decrease = 0
for j in range(1,366):
    temp = j - decrease
    tom = temp % 7
    if j%10 == 0:
        decrease += j - (tom - 1)
        tom = 1
    if tom in period:
        dayup = dayup * (1 + dayfactor)
print('每10天休息一次后是{}'.format(dayup))
每10天休息一次后是6.557520318378848
#3.3.2
dayup = 1
dayfactor = 0.01
period = [4,5,6,0]
decrease = 0
for j in range(1,366):
    temp = j - decrease
    tom = temp % 7
    if j%15 == 0:
        decrease += j - (tom - 1)
        tom = 1
    if tom in period:
        dayup = dayup * (1 + dayfactor)
print('每15天休息一次后是{}'.format(dayup))
每15天休息一次后是7.03054935549398
#3.4
number=input("请输入一个五位数:")
if len(number)==5:
     if eval(number)==eval(number[-1:]+number[3:4]+number[2:3]+number[1:2]+number[0:1]):
         print("这是回文数")
     else:
         print("这不是一个回文数")
请输入一个五位数:56655
这不是一个回文数
for i in range(11):
    if i in [0,5,10]:
        print("+ - - - - + - - - - +")
    else:
        print("|         |         |")
+ - - - - + - - - - +
|         |         |
|         |         |
|         |         |
|         |         |
+ - - - - + - - - - +
|         |         |
|         |         |
|         |         |
|         |         |
+ - - - - + - - - - +
#3.7
while True:
    for i in  ["/","-","|","\\","|"]:
        print("%s\r"%i,end='')
-会是一个一直选择的一条杠,这里不好展示
#3.8
from  tqdm import  tqdm
from  time import  sleep
for i in  tqdm(range(1,100)):
    sleep(0.01)
100%|██████████████████████████████████████████████████████████████████████████████████| 99/99 [00:01<00:00, 84.59it/s]

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转载自blog.csdn.net/qq_41318400/article/details/89424203